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Prevalence, pattern and severity of molar incisor hypomineralisation in 8- to 10-year-old school children in Ile-Ife, Nigeria

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Abstract

Aim

This study aimed to determine the prevalence, pattern and severity of MIH in school children resident in a suburban population in Nigeria.

Methods

This was a cross-sectional study involving pupils aged 8–10 years resident in suburban Nigeria. Details of each pupil’s socio-demographic variables were collected. Intra-oral examination was conducted to determine the presence of MIH, the affected tooth and the severity of the lesion. The association between the prevalence of MIH and socio-demographic variables of each child was determined. The predictors of MIH were also determined using a binomial regression analysis.

Result

Eighty-three of the 469 children examined (17.7 %) had MIH. There was no significant association between sex (p = 0.58), socio-economic status (p = 0.09), age (p = 0.26) and MIH. There was also no significant difference in the number of teeth affected by MIH in the maxilla and mandible, and on the right and left side of the face. The most commonly affected teeth were the left mandibular molars. The occlusal surfaces of the first molars were mostly affected by MIH and the severity of MIH on the teeth examined varied from mild (80.8 %), moderate (14.0 %) to severe (5.2 %).

Conclusion

The prevalence of MIH in this study population is consistent with previous reports. The non-association between sex and MIH prevalence, the varied severity of the lesion and association between MIH affectation of the first permanent molars and central incisors give more weight to the possible role of environmental factors in the aetiology of the lesion. The non-association between MIH and socio-economic status may serve as a distinctive feature of MIH and chronological enamel hypoplasia.

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Acknowledgments

The authors appreciate the parents and the children who gave their consent/assent to participate in the study, and the heads of the schools used for the study.

Conflict of interest

The authors have no conflict of interest to declare.

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Authors and Affiliations

  1. Department of Child Dental Health, Obafemi Awolowo University Teaching Hospital Complex, Ile-Ife, Osun State, Nigeria

    T. A. Oyedele, M. O. Folayan, C. A. Adekoya-Sofowora, E. O. Oziegbe & T. A. Esan

  2. Department of Child Dental Health, Faculty of Dentistry, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria

    M. O. Folayan, C. A. Adekoya-Sofowora & E. O. Oziegbe

  3. Department of Restorative Dentistry, Faculty of Dentistry, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria

    T. A. Esan

Authors
  1. T. A. Oyedele
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  2. M. O. Folayan
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  3. C. A. Adekoya-Sofowora
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  4. E. O. Oziegbe
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  5. T. A. Esan
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Correspondence to T. A. Oyedele.

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Oyedele, T.A., Folayan, M.O., Adekoya-Sofowora, C.A. et al. Prevalence, pattern and severity of molar incisor hypomineralisation in 8- to 10-year-old school children in Ile-Ife, Nigeria. Eur Arch Paediatr Dent 16, 277–282 (2015). https://doi.org/10.1007/s40368-015-0175-y

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  • DOI: https://doi.org/10.1007/s40368-015-0175-y

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